Wrench



March 26, 1929.

A J. WACHSMUTH WRENCH Filed July 15, 1925 (term l 'atentecl Mar. 26, 1929.

; UNITED STATES;

PATENT OFFICE.-

ALBERT J. WACHSMUTH, OF MUSKEGON, MICHIGAN.

RENCH Application filed July 13, 1925. Serial No. 43,061. i

This invention relates to wrenches and is particularly concerned withanovel jaw construction which may at any time be detachand my inventioncomprises means to this end whereby. it can be almost instantly changedfrom a pipe wrench to a monkey wrench or vice versa; and the detachablejaw which converts the monkey wrench into ,a pipe wrench is small andmay be readily carried in the pocket of the workman for use ,at anytime. p

With jaws of this character which are very quickly and easily detachedit is imperative that the angle of the jaw which engages withand bitesinto the pipe shall be correct, otherwise the jaw will pull loose if theangle is less or will not grip the pipe if it is greater. After longexperiment and trial I have provided a jaw in which the proper angle isobtained and which cannot be successfully changed.

A further feature of the invention resides in the novel mannerwherebythe attaching clip for connecting the removable jaw to the shankof the monkey wrench is connected with the jaw which, being of toolsteel and necessarily tempered,toughened and hardened at its face whereit is to engage the pipe, must be treated in a certain manner for thesimple and easy connection of theattach ing clip'thereto and this afterthe jaw has been tempered and toughened to the desired degree. Myinvention has for its object and .purpose the construction of aconvertible monkey and pipe wrench whereby all of the desirable featuresand characteristics above enumerated are incorporated as will beapparent from the following description taken in connection with theaccompanying drawing, in which, 7

Fig. 1 is an elevation of a monkey wrench with the pipe jaw attachmentconnected therewith. i Fig. 2 is a side elevation of the pipe jawattachment. s

Fig. 3 it an under plan view of the device shown in Fig. 2.

Fig. f is a vertical said pipe jaw attachment, and

Fig. 5 is a horizontal section therethrough, Figs. 4 and 5 beingenlarged.

section taken through Like reference characters refer to like parts inthe different figures of the drawing.

The monkey wrench is of usual construction including the shank 1 and a'stationary jaw 2 extending at right angles from the upper end of theshank, thelower end of the shank being equipped with a handle 3. Theadjustable or movable jaw 4 is adjusted by means of a screw 5 in themanner usual with monkey wrenches and completes the monkey wrenchconstruction which is no different than that of any well-known type ofmonkey wrench.

The pipe jaw 6 has anupper horizontal face and an inner vertical facelocated at right angles to'each other, while the under serrated ortoothed face 71 comprising the sidelwhich is to engage with the pipe'islo- 1 cated at an angle of thirty degrees to the horizontal. This angleis one'which I have the quality of tempering the steel thereafter to thedepth that the steel is decarbonized but as the serrated jaw face .7 islocated at the interior of the block this'annealing and decarbonizing,taking place at the outer faces, has no effect thereon.

The block of steel, the outline of which is indicated in dotted lines inFig. 4, is machined to make the jaw 6 with the toothed side 7 and in theinner vertical face a horizontal slot 9 is cut. This jaw 6 is thentempered but as before stated the outer surface portions where the steelhasbeen decarbonized do not take temper. I This from a functionalstandpoint is of no consequence with respect to the upper horizontalface of the block but is of exceptional consequence in connection withthose portions of the jaw above and below the slot 9. s

The attaching clip is substantially of U- shape having spaced apartspring sides 11 connected by a cross member 10. which is adapted to beplaced within the slot 9, after which the metal of the block adjacent atleast one edge of the cross member 10-is peaned over said edge of. themember 10 permanently securing the clip to the jaw 6.

found substantially essential to the successful This is indi- While Ihave shown such peaning of the metal only at one side 12 ofthe part itis evident that this process may be carried out at both edges thereofand the attaching clip be permanently secured to the jaw 6 having theserrated pipe engaging under face 7.. i

This separable jaw is adapted to be readily attached to the shank 1 ofthe wrench, its upper horizontal face coming against the under side ofthe permanent jaw 2, the sides of the clip 11 passing one at each sideof the shank 1, while the inner vertical face of the jaw 6 lies againstthe innervertical side of the shank 1. The jaw may be instantly attachedor removed.

When attached in place, as shown in Fig. 1, a it is adapted 'toengageand bite lnto the surface of a cylindrical pipe such as indicated at P,the angle of thirty (,legrees to the horizontal for the serrated ortoothed face 7 causing the teeth to bite into the surface of the pipeand at the same time inpermanently connected with the wrench, but

:monkey wrench. If the angle is greater than thirty degrees the teeth ofthe jaw will not bite into the pipe satisfactorily.

The construction while of simple character is very effective, durableand eliicient. The appended claim defines the invention and I considermyself entitled to all forms of structure coming within its scope.

I claim: H

A pipe attachment for wrenches made of hardened. steel, one edge ofwhich has been decarbonized in annealing whereby said edge remains softafter the body of the attachment has been hardened, a groove in saiddecarbonized edge, and a clip arranged in said groove and held in placeby swedging the I in testimony whereof I aflix my signature.

, ALBERT J. WACHSMUTH.

-1nctal of the edge of said groove: over said" clip.

